The Celtics used their full mid-level exception on Wednesday to make their signing of veteran guard, Jason Terry, official. Terry’s deal will be worth approximately $15 million over the course of three seasons.

Danny Ainge had tried to persuade the Dallas Mavericks to sign-and-trade Terry to the Celtics so that he could maintain the team’s mid-level exception to pursue another starting caliber guard. The Mavericks signedOJ Mayo on tuesday with the remainder of the team’s cap space. It is believed that the Mayo signing killed any potential deal the Celtics and Mavs could have reached.

The Celtics will now look to convince the Houston Rockets to send guard Courtney Lee to them via sign-and-trade. If the Celtics are unable to work out an arrangement to land Lee, they are financially strapped and only have access to the bi-annual exception ($1.7 million) or veteran minimum salaries